Fixed Incendiary Mithocondria, nerfed Cryokinesis a bit

Incendiary Mithocondria now sets yourself on fire as intended instead of
doing nothing.
Cryokinesis now freezes you for a bit more than ten seconds and deals 20
damage instantly then around ten damage over the duration instead of the 30 seconds of
freeze and more than 40 damage over the duration it did before. It also doesn't work if the target has cold resistance now.
![ss 2014-04-13 at 09 42 31](https://cloud.githubusercontent.com/assets/5224390/2690504/ec7c2f56-c34a-11e3-96da-55bc7e65c5aa.png)